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Vishay General Semiconductor - Diodes Division SMA5J12AHE3/61
- Part No.:
- SMA5J12AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12AHE3/61.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,574
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Product details
Overview
SMA5J12AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 25.1 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J12AHE3/61 datasheet, SMA5J12AHE3/61 pinout, SMA5J12AHE3/61 application, or SMA5J12AHE3/61 equivalent, key selection criteria include clamping performance under 25.1 A surge, AEC-Q101 qualification status, unidirectional polarity marking, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, activating when reverse voltage exceeds its 13.3–14.7 V breakdown threshold to divert transient energy away from downstream components. Its glass-passivated junction ensures stable leakage (<1.0 μA at 12 V) and fast response time (<1.0 ps), critical for suppressing ESD and inductive switching spikes.
Rated for -55 °C to +150 °C junction temperature, it supports automotive-grade reliability with AEC-Q101 qualification (HE3 suffix), RoHS compliance, and MSL Level 1 moisture sensitivity. The SMA (DO-214AC) package enables high power density (500 W) in low-profile surface-mount form with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V rail protection. |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - precise breakdown window ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 19.9 V at 25.1 A - clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves efficiency in battery-powered or high-impedance sensor circuits. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive and industrial ambient conditions. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity marked by cathode band on one end. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated for reliable reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping event. |
| Cathode | Protected line connection / voltage reference | Connected to line being protected (e.g., 12 V supply rail); band-marked end identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics with lifetime reliability under thermal cycling and vibration. |
| Glass passivated junction | Ensures stable electrical parameters over time and humidity exposure, eliminating parameter drift in harsh environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without pre-baking, reducing manufacturing complexity and cost in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power distribution networks in ADAS camera modules and infotainment head units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤19.9 V during 25.1 A surge, preventing latch-up or gate oxide damage in downstream PMICs. | Use Scenario: Shielding analog output lines of pressure or temperature sensors in PLC I/O modules from field wiring-induced surges. IC Role / Device Role / Timing Role: Shunt protector on 4–20 mA loop or 0–10 V analog output path, located adjacent to connector. Use Value: Sub-20 V clamping preserves signal integrity and avoids saturation of op-amps or ADC front-ends during 1 kV/500 A transients. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and secondary-side 12 V output against lightning-induced surges on mains or output cables. IC Role / Device Role / Timing Role: Secondary-side TVS across 12 V output rail, upstream of LDO regulators powering SoCs. Use Value: 500 W PPPM rating handles repetitive 10/1000 μs surges without degradation, extending adapter service life in surge-prone regions. | Use Scenario: Protecting PoE-powered remote radio units (RRUs) and fiber access nodes fed via -48 V DC plant power. IC Role / Device Role / Timing Role: Unidirectional clamp on -48 V feed line, oriented to suppress positive-going transients only. Use Value: 12 V VWM allows use with regulated -48 V systems using level-shifted monitoring; cathode-to-rail configuration enables direct integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12A-E3/61 | Same electrical specs, but commercial-grade (non-AEC-Q101); no automotive qualification. | Limited to consumer/industrial use where automotive reliability testing is not required. | Select when cost sensitivity outweighs automotive qualification needs and ambient temperature stays ≤125 °C. |
| SMC5J12AHE3/61 | Same VWM/VBR/VC ratings, but larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. 80 °C/W. | Higher thermal mass supports higher average surge duty cycles; requires larger PCB footprint. | Choose when system-level thermal management demands lower junction temperature rise under repeated surges. |
Compared with SMA5J12AHE3/61, the SMA5J12A-E3/61 offers identical protection performance without AEC-Q101 validation, while the SMC5J12AHE3/61 delivers superior thermal dissipation at the cost of board space - enabling design trade-offs between qualification scope, layout density, and thermal resilience.
Availability
SMA5J12AHE3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeding applications requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMA5J12AHE3/61 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power density, and application-specific qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance.
FAQ
What is the clamping voltage of the SMA5J12AHE3/61 under a 10/1000 μs surge?
The SMA5J12AHE3/61 has a maximum clamping voltage (VC) of 19.9 V at 25.1 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J12AHE3/61 maintains this clamping performance across its rated junction temperature range (-55 °C to +150 °C), ensuring consistent protection in automotive under-hood environments.
Is the SMA5J12AHE3/61 AEC-Q101 qualified?
Yes, the SMA5J12AHE3/61 is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and Vishay's official documentation. This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature operating life, validating its suitability for automotive electronic control units. The SMA5J12AHE3/61 meets all requirements for use in non-safety-critical automotive subsystems such as body electronics and infotainment power rails.
What does the "/61" suffix indicate in SMA5J12AHE3/61?
The "/61" suffix in SMA5J12AHE3/61 specifies the preferred packaging format: 7-inch diameter plastic tape and reel, with a base quantity of 1800 units per reel. This packaging supports high-speed automated pick-and-place assembly and complies with EIA-481 standards. The SMA5J12AHE3/61 is also available in alternate formats (e.g., /5A for 13-inch reels), but /61 is the standard logistics configuration for volume production.
How does the SMA5J12AHE3/61 differ from bidirectional TVS diodes like SMA5J12CA?
The SMA5J12AHE3/61 is unidirectional and functions only during reverse-voltage transients, with polarity marked by a cathode band; SMA5J12CA is bidirectional and protects against surges of either polarity without polarity marking. The SMA5J12AHE3/61 exhibits forward voltage drop (~3.5 V at 25 A) in forward bias, whereas SMA5J12CA has symmetrical clamping in both directions. Use SMA5J12AHE3/61 on DC rails where polarity is fixed; choose SMA5J12CA for AC-coupled or floating signal lines.
What is the thermal resistance of the SMA5J12AHE3/61, and how does it affect layout?
The SMA5J12AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad area increases thermal resistance and risks exceeding +150 °C junction temperature during repeated surges. For sustained high-duty-cycle applications, consider adding thermal vias or increasing copper area to maintain safe operation of the SMA5J12AHE3/61.
SMA5J12AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 25.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J12AHE3/61 FAQ
1.How can I place an order for SMA5J12AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12AHE3/61 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMA5J12AHE3/61 reliable?
The price and inventory of SMA5J12AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J12AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12AHE3/61?
SMA5J12AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12AHE3/61 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMA5J12AHE3/61?
For technical support, including SMA5J12AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12AHE3/61 requirements.
6.How does Aetrix verify that SMA5J12AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12AHE3/61 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMA5J12AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12AHE3/61?
All SMA5J12AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12AHE3/61, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMA5J12AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J12AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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